Image displaying method and electronic device

ABSTRACT

The present disclosure proposes an image displaying method applied in an electronic device. The electronic device comprises a display unit and a projection unit. The display unit is placed on a first surface of the electronic device. The method comprises: determining data to be displayed when the projection unit is placed on a second surface of the electronic device opposite to the first surface; projecting, by the projection unit, the data to be displayed onto a carrier to present a first display image on the carrier, the first display image corresponds to a first part of the data to be displayed; displaying, by the display unit, a second part of the data to be displayed to display a second display image corresponding to the second part on the display unit. The present disclosure further proposes an electronic device.

TECHNICAL FIELD

The present disclosure relates to the field of electronics technology,and in particular, to an image displaying method and an electronicdevice.

BACKGROUND

With the development of technology, many electronic devices have beencome in people's life with great facility. A mobile phone has powerfulfunctionalities, such as placing calls, sending messages, playing games,surfing on the Internet, investing in stocks, etc.

Typically, the existing mobile phone is provided with a display screenfor presenting text and image information to the user.

However, the display screen provided on the existing mobile phone isusually very small. In view of this, there is a technical problem thatdata to be displayed cannot be clearly displayed, thereby easilyresulting in visual fatigue for the user watching a small-size screenfor long time.

SUMMARY

Embodiments of the present disclosure provide an image displaying methodand an electronic device, which can solve the problem for the existingmobile phone provided with a small screen that data to be displayedcannot be clearly displayed, thereby easily resulting in visual fatiguefor the user watching a small-size screen for long time.

A first aspect of the present disclosure provides an image displayingmethod applied in an electronic device. The electronic device comprisesa display unit and a projection unit having a projection area. Thedisplay unit is placed on a first surface of the electronic device. Themethod comprises:

-   -   determining data to be displayed when the projection unit is        placed on a second surface of the electronic device opposite to        the first surface;    -   projecting, by the projection unit, the data to be displayed        onto a carrier to present a first display image on the carrier,        wherein the carrier is placed in the projection area and the        first display image at least corresponds to a first part of the        data to be displayed;    -   displaying, by the display unit, a second part of the data to be        displayed to display a second display image corresponding to the        second part on the display unit in such a manner that when an        observer located at the display unit side observes the first and        second display images, the second display image is a part of the        first display image, which is shielded by the electronic device;    -   wherein a first distance between the carrier and the projection        unit is larger than or equal to a preset distance, so that a        carrying area on the carrier for carrying the first display        image is larger than a display area of the display unit.

Preferably, said projecting, by the projection unit, the data to bedisplayed on the carrier to present the first display image on thecarrier comprises:

-   -   projecting, by the projection unit, the data to be displayed        onto the carrier in a first projection direction;    -   determining the carrying area on the carrier for carrying the        first display image as a first carrying area, wherein the first        carrying area is a fixed area on the carrier;    -   detecting whether there is a translation movement for the        electronic device relative to the carrier;    -   obtaining a translation vector of the translation movement when        detecting the translation movement;    -   determining a second projection direction based on the        translation vector, wherein the second projection direction is a        projection direction that allows the electronic device to, after        the translation movement, project the data to be displayed onto        the first carrying area; and    -   projecting, by the projection unit, the data to be displayed        onto the first carrying area in the second projection direction,        so as to keep the first display image be presented on the first        carrying area.

Preferably, said projecting, by the projection unit, the data to bedisplayed onto the carrier to present the first display image on thecarrier comprises:

-   -   obtaining a current included angle between a preset edge of the        display unit and the horizontal direction;    -   judging whether the current included angle is 0 degree;    -   when the current included angle is 0 degree, directly projecting        the data to be displayed onto the carrier to present the        horizontally displayed first display image on the carrier;    -   when the current included angle is not 0 degree, determining an        adjustment angle based on the current included angle;    -   adjusting the data to be displayed based on the adjustment        angle; and    -   projecting the adjusted data to be displayed onto the carrier,        so as to present the horizontally displayed first display image        on the carrier.

Preferably, the projection unit comprises:

-   -   a case in a sealed state, inside which an accommodation cavity        is formed, a preset dose of liquid being held in the        accommodation cavity and a transmittance of a first face of the        case meeting a preset condition;    -   a projection module placed in the accommodation cavity and        floating on the liquid, the projection module being capable of        projecting the data to be displayed onto the carrier though the        first face of the case;    -   wherein the current included angle between the preset edge of        the display unit and the horizontal direction is 0 degree, the        projection unit is capable of presenting the horizontally        displayed first display image on the carrier; when the current        included angle is not 0 degree, the projection unit is still        capable of presenting the horizontally displayed first display        image on the carrier.

Preferably, said projecting, by the projection unit, the data to bedisplayed onto the carrier to present the first display image on thecarrier comprises:

-   -   obtaining a first distance value of the first distance and a        first preset size of the first display image at a first moment;    -   determining a current projection angle of the projection unit as        a first projection angle based on the first distance value and        the first preset size;    -   projecting, by the projection unit, the data to be displayed        onto the carrier in the first projection angle in such a manner        that a size of the first display image presented on the carrier        is the first preset size;    -   obtaining a second distance value of the first distance at a        second moment after the first moment, the second distance value        being different from the first distance value;    -   determining the current projection angle as a second projection        angle based on the second distance value and the first preset        size; and    -   projecting, by the projection unit, the data to be displayed        onto the carrier in the second projection angle in such a manner        that a size of the first display image presented on the carrier        is kept as the first preset size.

Preferably, said displaying, by the display unit, the second part of thedata to be displayed comprises:

-   -   determining, by an image collecting unit placed on the second        surface, the second display image from the first display image        presented on the carrier; and    -   displaying the second display image by the display unit.

A second aspect of the present disclosure provides an electronic device,comprising:

-   -   a display unit placed on a first surface of the electronic        device;    -   a projection unit placed on a second surface of the electronic        device and having a projection area, the first surface being        opposite to the second surface;    -   a processor connected to the display unit and the projection        unit, the processor being configured to:        -   determine data to be displayed when the projection unit is            placed on a second surface of the electronic device opposite            to the first surface;        -   project, by the projection unit, the data to be displayed            onto a carrier to present a first display image on the            carrier, wherein the carrier is placed in the projection            area and the first display image at least corresponds to a            first part of the data to be displayed;        -   displaying, by the display unit, a second part of the data            to be displayed to display a second display image            corresponding to the second part on the display unit in such            a manner that when an observer located at the display unit            side observes the first and second display images, the            second display image is a part of the first display image,            which is shielded by the electronic device;    -   wherein a first distance between the carrier and the projection        unit is larger than or equal to a preset distance, so that a        carrying area on the carrier for carrying the first display        image is larger than a display area of the display unit.

Preferably, said processor is further configured to:

-   -   project, by the projection unit, the data to be displayed onto        the carrier in a first projection direction;    -   determine the carrying area on the carrier for carrying the        first display image as a first carrying area, wherein the first        carrying area is a fixed area on the carrier;    -   detect whether there is a translation movement for the        electronic device relative to the carrier;    -   obtain a translation vector of the translation movement when        detecting the translation movement;    -   determine a second projection direction based on the translation        vector, wherein the second projection direction is a projection        direction that allows the electronic device to, after the        translation movement, project the data to be displayed onto the        first carrying area; and    -   project, by the projection unit, the data to be displayed onto        the first carrying area in the second projection direction, so        as to keep the first display image be presented on the first        carrying area.

Preferably, said processor is further configured to:

-   -   obtain a current included angle between a preset edge of the        display unit and the horizontal direction;    -   judge whether the current included angle is 0 degree;    -   when the current included angle is 0 degree, directly control        the projection unit to project the data to be displayed onto the        carrier to present the horizontally displayed first display        image on the carrier;    -   when the current included angle is not 0 degree, determine an        adjustment angle based on the current included angle;    -   adjust the data to be displayed based on the adjustment angle;        and    -   project the adjusted data to be displayed onto the carrier, so        as to present the horizontally displayed first display image on        the carrier.

Preferably, the projection unit comprises:

-   -   a case in a sealed state, inside which an accommodation cavity        is formed, a preset dose of liquid being held in the        accommodation cavity and a transmittance of a first face of the        case meeting a preset condition;    -   a projection module placed in the accommodation cavity and        floating on the liquid, the projection module being capable of        projecting the data to be displayed onto the carrier though the        first face of the case;    -   wherein the current included angle between the preset edge of        the display unit and the horizontal direction is 0 degree, the        projection unit is capable of presenting the horizontally        displayed first display image on the carrier; when the current        included angle is not 0 degree, the projection unit is still        capable of presenting the horizontally displayed first display        image on the carrier.

Preferably, said processor is further configured to:

-   -   obtain a first distance value of the first distance and a first        preset size of the first display image at a first moment;    -   determine a current projection angle of the projection unit as a        first projection angle based on the first distance value and the        first preset size;    -   project, by the projection unit, the data to be displayed onto        the carrier in the first projection angle in such a manner that        a size of the first display image presented on the carrier is        the first preset size;    -   obtain a second distance value of the first distance at a second        moment after the first moment, the second distance value being        different from the first distance value;    -   determine the current projection angle as a second projection        angle based on the second distance value and the first preset        size; and    -   project, by the projection unit, the data to be displayed onto        the carrier in the second projection angle in such a manner that        a size of the first display image presented on the carrier is        kept as the first preset size.

Preferably, said electronic device further comprises an image collectingdevice placed on the second surface and connected to the processor. Inthis case, the processor is further configured to: determine, by theimage collecting device, the second display image from the first displayimage presented on the carrier; and display the second display image bythe display unit.

One or more technical solutions according to embodiments of the presentdisclosure have at least technical effects as follows.

1. The embodiments of the present disclosure may use the projection unitto project data to be displayed onto the carrier, such as a wall or aprojection curtain. Moreover, the carrying area on the carrier fordisplaying the first display image is larger than the display area ofthe display unit. This may obtain on the carrier a large-size displayimage for the data to be displayed, thereby solving the technicalproblem of the existing mobile phone that the data to be displayedcannot be clearly displayed, thereby easily resulting in visual fatiguefor the user watching a small-size screen for long time. Then, the usermay see an enlarged image of the data to be displayed on the carrier.

2. The use of the projection unit may enable the mobile phone to sharethe data to be displayed on the carrier, such as a wall or a projectioncurtain, for more users to watch the data to be displayed.

3. According to the embodiments of the present disclosure, the displayunit of the electronic device is used to display the second displayimage. The second display image is a part of the first display image,which is shielded by the electronic device when the user watches overthe electronic device the first display image projected onto thecarrier. Thereby, the user may obtain more realistic game experiencesand visual enjoyment. For example, when the user is playing, forexample, a racing game as shown in FIG. 6, the second display image mayonly contain a racing car. At this time, the user may manipulate thegame as really driving in the racing car, and obtain the road conditionfor the racing car and its surroundings from the first display image401. Thereby, the user may obtain more realistic game experiences andvisual enjoyment.

4. According to the embodiments of the present disclosure, when theprojection unit performs a projection, if there is a translationmovement for the electronic device relative to the carrier, theprojection unit may make a corresponding adjustment to keep the firstdisplay image be presented on the same carrier area of the carrier. Thismay present the first display image on the first carrying area of thecarrier no matter how the electronic device translates. In this way,when a size of the carrier is small, it is possible to continuouslyproject the first display image onto the first carrying area. Meanwhile,this may further eliminate jitters of the translation movement of thefirst display image when the electronic device is held in hand, so thatthe observer watching the first display image can watch the firstdisplay image in a stable state without jitters.

5. According to the embodiments of the present disclosure, when theprojection unit performs a projection, if the electronic devices swingsclockwise or anticlockwise, the electronic device may make acorresponding adjustment to keep the horizontally displayed firstdisplay image be presented on the carrier. Thus, this may achieve thetechnical effect that the first display image projected onto the carriermay always keep in a horizontal situation no matter how the electronicdevice swings. In this way, when the electronic device is held in hand,this may protect the first display image from rotating clockwise oranticlockwise due to hand shakes. Thereby, this allows the observer towatch the first display image in a clear, stable, and non-shaky manner.

6. According to the embodiments of the present disclosure, a size of thefirst display image may be freely set. Moreover, the electronic devicemay adjust a projection angle of a projection unit in real time based onthe user setting and depending on a distance between the electronicdevice and the carrier. This may project from the size of the firstdisplay image from changing due to swinging of the electronic devicewhen it is held by the user. Thereby, the present disclosure may achievea technical effect of keeping the size of the first display imagepresented on the carrier unchanged.

7. The embodiments of the present disclosure provide a projection unit.The projection unit includes a case and a projector. The case is in asealed state. An accommodation cavity is formed inside the case. Thereis a preset dose of liquid held in the accommodation cavity. Atransmittance of a first face of the case meets a preset condition. Theprojector is placed in the accommodation cavity and floats on theliquid. The projector is capable of projecting the data to be displayedonto the carrier though the first face of the case. With such aprojection unit, when the current included angle between a preset edgeof the display unit and the horizontal direction is 0 degree, theprojector can present the horizontally displayed first display image onthe carrier. When the current included angle between the preset edge ofthe display unit and the horizontal direction is not 0 degree, theprojector can still present the horizontally displayed first displayimage on the carrier.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a structure diagram of a first surface (i.e., the front) of anelectronic device according to an embodiment of the present disclosure;

FIG. 2 is a structure diagram of a second surface (i.e., the back) of anelectronic device according to an embodiment of the present disclosure;

FIG. 3 is a flowchart of an image displaying method according to anembodiment of the present disclosure;

FIG. 4 is a schematic diagram of data to be displayed according to anembodiment of the present disclosure;

FIG. 5 is a schematic diagram of a scenario where a projection unit ofan electronic device performs a projection in a first projectiondirection according to an embodiment of the present disclosure;

FIG. 6 is a schematic diagram of a first display image and a seconddisplay image when a current included angle between a preset edge of anelectronic device and the horizontal direction is 0 degree, i.e., thepreset edge of the electronic device is in a horizontal situation,according to an embodiment of the present disclosure;

FIG. 7 is a first refined flowchart of step S302 according to anembodiment of the present disclosure;

FIG. 8 is a schematic diagram of a scenario where a projection unit ofan electronic device performs a projection in a second projectiondirection according to an embodiment of the present disclosure;

FIG. 9 is a schematic diagram of a first display image and a seconddisplay image when a current included angle between a preset edge of anelectronic device and the horizontal direction is not 0 degree, i.e.,the preset edge of the electronic device is not in a horizontalsituation, according to an embodiment of the present disclosure;

FIG. 10 is a second refined flowchart of step S302 according to anembodiment of the present disclosure;

FIG. 11 is a structure diagram of a projection unit according to anembodiment of the present disclosure;

FIG. 12 is a schematic diagram of a scenario where a projection unit isused to perform a projection to form a first display image when acurrent included angle between a preset edge of an electronic device andthe horizontal direction is 0 degree, i.e., the preset edge of theelectronic device is in a horizontal situation, according to anembodiment of the present disclosure;

FIG. 13 is a schematic diagram of a scenario where a projection unit isused to perform a projection to form a first display image when acurrent included angle between a preset edge of an electronic device andthe horizontal direction is not 0 degree, i.e., the preset edge of theelectronic device is not in a horizontal situation, according to anembodiment of the present disclosure;

FIG. 14 is a third refined flowchart of step S302 according to anembodiment of the present disclosure;

FIG. 15 is a refined flowchart of step S303 according to an embodimentof the present disclosure;

FIG. 16 is a schematic diagram of a first display image and a seconddisplay image after a translation movement of an electronic devicerelative to a first carrying area according to an embodiment of thepresent disclosure;

FIG. 17 is a schematic diagram of a projection unit performs aprojection in a first projection angle according to an embodiment of thepresent disclosure;

FIG. 18 is a schematic diagram of a projection unit performs aprojection in a second projection angle according to an embodiment ofthe present disclosure; and

FIG. 19 is a schematic diagram of an electronic device according to anembodiment of the present disclosure.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

In order to solve the technical problem for the existing mobile phoneprovided with a small screen that data to be displayed cannot be clearlydisplayed, thereby easily resulting in visual fatigue for the userwatching a small-size screen for long time, the present disclosureprovides an image displaying method and an electronic device.

A technical solution of the present disclosure may be described as animage displaying method applied in an electronic device. The electronicdevice comprises a display unit and a projection unit having aprojection area. The display unit is placed on a first surface of theelectronic device. The method comprises:

-   -   determining data to be displayed when the projection unit is        placed on a second surface of the electronic device opposite to        the first surface;    -   projecting, by the projection unit, the data to be displayed        onto a carrier to present a first display image on the carrier,        wherein the carrier is placed in the projection area and the        first display image at least corresponds to a first part of the        data to be displayed;    -   displaying, by the display unit, a second part of the data to be        displayed, to display a second display image corresponding to        the second part on the display unit in such a manner that when        an observer located at the display unit side observes the first        and second display images, the second display image is a part of        the first display image, which is shielded by the electronic        device;    -   wherein a first distance between the carrier and the projection        unit is larger than or equal to a preset distance, so that a        carrying area on the carrier for carrying the first display        image is larger than a display area of the display unit.

Detailed description of technical solutions of the present disclosurewill be made through drawings and specific embodiments. It will beappreciated that embodiments of the present disclosure and specificfeatures in the embodiments are detailed descriptions, rather thanlimitations, of the technical solutions of the present disclosure. Theembodiments of the present disclosure and technical features therein maybe combined with each other without conflicts.

The term “and/or” in the context only describes an association ofassociated objects and refers to existence of three relationships. Forexample, A and/or B may refer to three cases: only A exists; A and Bboth exist; and only B exists. Moreover, the character “/” in thecontext generally indicates associated objects before and after it arein a “or” relationship.

First Embodiment

An image displaying method, as shown in FIGS. 1 and 2, are applied in anelectronic device 10. In an implementation, the electronic device 10 maybe a smart phone, a tablet computer, etc, and the present disclosure isnot limited thereto. The electronic device 10 includes a display unit101 and a projection unit 102 having a projection area. The display unit101 is placed on a first surface (i.e., the front) of the electronicdevice 10. The projection unit 102 may be fixedly placed on a secondsurface (i.e., the back) of the electronic device 10, which is oppositeto the first surface. Alternatively, the projection unit 102 may be afreely rotatable device, which may be rotatablely placed either on thefirst surface or on the second surface. As shown in FIG. 3, the methodmay include steps S301, S302 and S303.

At step S301, data to be displayed is determined when the projectionunit is placed on the second surface of the electronic device oppositeto the first surface.

In an implementation, as shown in FIG. 4, data to be displayed 40 may bea picture, a frame of image, a scenario/interface image of anapplication, such as a frame of image of dynamic images in a racinggame. These are not limiting.

At step S302, as shown in FIG. 5, the data to be displayed 40 isprojected by the projection unit 102 onto a carrier 20 to present afirst display image on the carrier 20.

The carrier 20 is placed in the projection area and the first displayimage at least corresponds to a first part of the data to be displayed40.

In an implementation, the carrier 20 may be a wall, ablackboard/whiteboard (for use in presentation), or a projectioncurtain, etc. The carrier 20 should have a plane for clearly presentingthe first display image.

In an implementation, as shown in FIG. 6, the first part (i.e., a firstdisplay image 401) may be either a part of the data to be displayed 40(i.e., a part left after removing the data to be displayed 40), or anentirety of the data to be displayed 40.

At step S303, a second part of the data to be displayed 40 is displayedby the display unit 101, to display on the display unit 101 a seconddisplay image 402 corresponding to the second part in such a manner thatwhen an observer located at the display unit 101 side observes the firstdisplay image 401 and the second display image 402, the second displayimage 402 is a part of the first display image 401, which is shielded bythe electronic device 10.

According to the embodiment of the present disclosure, the display unit101 of the electronic device 10 is used to display the second displayimage. The second display image is a part of the first display image401, which is shielded by the electronic device 10 when the user watchesover the electronic device 10 the first display image 401 projected ontothe carrier 20. The user may watch the first display image 401 throughthe carrier 20 and watch the second display image 402 through thedisplay unit 101. The first display image 401 and the second displayimage 402 form an entirety of the data to be displayed 40. In this case,the user may obtain the data to be displayed 40, which is completelydisplayed, by using the carrier 20 and the display unit 101. This maybring new visual experiences. For example, when the user is playing, forexample, a racing game as shown in FIG. 6, the second display image 402may only contain a racing car, and the first display image 401 shows aroad condition for the racing car. At this time, the user may manipulatethe game as really driving in the racing car, and obtain the roadcondition for the racing car and its surroundings from the first displayimage 401. Thereby, the user may obtain more realistic game experiencesand visual enjoyment.

In an implementation, the second display image 402 may be a part of thefirst display image 401 (or the data to be displayed 40), which isshielded by the electronic device 10, when an observer located at thedisplay unit 101 side observes the first display image 401 and thesecond display image 402. For example, as shown in FIG. 6, the seconddisplay image 402 is an image containing a racing car and a part ofcourse. This image belongs to the first display image 401, however, dueto being shielded by the electronic device 10, cannot be seen by theuser directly facing the display unit 101. As another example, thesecond display image 402 may be an image containing a tree and a part ofcourse.

The present disclosure further provides the following implementationsbased on the above image displaying method. Any of the followingimplementations may be combined.

A First Implementation

As shown in FIG. 5, a first distance between the carrier 20 and theprojection unit 102 is larger than or equal to a preset distance, sothat a carrying area on the carrier 20 for presenting the first displayimage is larger than a display area of the display unit.

Typically, the existing smart phone could only use its own display unitfor displaying an image. However, as a size of such a display unit issmall, it is impossible to clearly display an image, thereby easilyresulting in visual fatigue for the user watching a small-size screenfor long time.

In this implementation, the projection unit 102 is used to project thedata to be displayed onto the carrier 20, such as onto a wall or aprojection curtain. Moreover, the carrying area on the carrier 20 forpresenting the first display image is larger than the display area ofthe display unit. This may form on the carrier 20 a large-size displayimage for the data to be displayed 40, thereby solving the technicalproblems occurring in a small-screen phone.

A Second Implementation

As shown in FIG. 7, step S302 may include steps S501-S506. At step S501,as shown in FIG. 5, the data to be displayed 40 is projected by theprojection unit 102 onto the carrier 20 in a first projection direction.

At step S502, the carrying area on the carrier 20 for carrying the firstdisplay image 401 is determined as a first carrying area 201. The firstcarrying area 201 may be a fixed area on the carrier 20.

At step S503, it is detected whether there is a translation movement forthe electronic device 10 relative to the carrier 20.

At step S504, a translation vector of the translation movement isobtained when the translation movement is detected. As an example, animage collecting device such as a camera may be installed on the firstsurface (or the second surface) of the electronic device 10. The cameracollects an image directly facing the front of the display unit 101. Ifthere is a translation movement for the electronic device 10 relative tothe first carrying area 201, the image collected by the image collectingdevice may change. For example, the scenery in the image moves towardsthe lower left. The electronic device 10 may obtain a translation vectorof the translation movement based on a change rule of the image.

At step S505, a second projection direction is determined based on thetranslation vector. The second projection direction is a projectiondirection that allows the electronic device 10 to, after the translationmovement, project the data to be displayed 40 onto the first carryingarea 201.

At step S506, as shown in FIG. 8, the data to be displayed 40 isprojected by the projection unit 102 onto the first carrying area 201 inthe second projection direction, so as to keep the first display image401 be presented on the first carrying area 201.

In this implementation, no matter how the electronic device 10translates, it is possible to present the first display image 401 on thefirst carrying area 201 of the carrier 20. In this way, when a size ofthe carrier 20 is small, it is possible to continuously project thefirst display image 401 onto the first carrying area 201. Meanwhile,this may further eliminate jitters of the translation movement of thefirst display image 401 when the electronic device 10 is held in hand,so that the observer watching the first display image 401 can watch thefirst display image 401 in a stable state without jitters.

A Third Implementation

As shown in FIG. 10, step S302 may include steps S601-S606.

At step S601, a current included angle between a preset edge 1001 of thedisplay unit 101 and the horizontal direction is obtained. For example,the current included angle may be obtained by using a gravity sensor, agyroscope, etc.

At step S602, it is judged whether the current included angle is 0degree. That is, it is judged whether the preset edge 1001 is in ahorizontal situation.

At step S603, as shown in FIG. 6, when the current included angle is 0degree, the data to be displayed 40 is directly projected onto thecarrier 20 to present the horizontally displayed first display image 401on the carrier 20.

At step S604, as shown in FIG. 9, when the current included angle is not0 degree, an adjustment angle is determined based on the currentincluded angle. For example, when the current included angle is 20degree clockwise, the adjustment angle should be 20 degreeanticlockwise.

At step S605, the data to be displayed 40 may be correspondinglyadjusted based on the adjustment angle. For example, the data to bedisplayed 40 may be rotated by 20 degree anticlockwise.

At step S606, the adjusted data to be displayed 40 is projected onto thecarrier 20, so as to present the horizontally displayed first displayimage 401 on the carrier 20.

In this implementation, no matter how the electronic device 10 swings toright and left (e.g., rotating clockwise or rotating anticlockwise), thefirst display image 401 projected onto the carrier 20 may still keeps ina horizontal situation. In this way, when the electronic device is heldin hand, this may protect the first display image 401 from rotatingclockwise or anticlockwise due to hand shakes. Thereby, this allows theobserver to watch the first display image 401 in a clear, stable, andnon-shaky manner.

A Fourth Implementation

As shown in FIG. 11, the projection unit 102 may include a case 1021 anda projection module 1023.

The case 1021 is in a sealed state. An accommodation cavity is formedinside the case 1021. A preset dose of liquid 1022, e.g., water, oil,fine sand, mercury, etc., is held in the accommodation cavity. Atransmittance of a first face (A, B, C or D) of the case 1021 meets apreset condition, i.e., with good transmittance.

The projection module 1023 is placed in the accommodation cavity, and iscapable of floating on the liquid 1022, that is, an average density ofthe projection module 1023 is smaller than that of the fluid 1022.Moreover, the projection module 1023 is capable of connected to theelectronic device 10 in a wired or wireless manner and projecting thedata to be displayed 40 onto the carrier 20 though the first face (A, B,C, or D) of the case.

As shown in FIG. 12, when the current included angle between a presetedge of the display unit 101 and the horizontal direction is 0 degree,the projection module 1023 may present the horizontally displayed firstdisplay image 401 on the carrier 20. As shown in FIG. 13, when thecurrent included angle is not 0 degree, the projection module 1023 maystill preset the horizontally displayed first display image 401 on thecarrier 20.

In this implementation, no matter how the case 1021 swings clockwise oranticlockwise following the electronic device 10, the projection module1023 keeps in the horizontal situation under the action of the fluid1022, thereby always presenting the horizontally displayed first displayimage on the carrier 20.

In this implementation, no manner whether the electronic device 10 is ina horizontal situation, it is possible to present the horizontallydisplayed first display image 401 on the carrier 20. In this way, whenthe electronic device is held in hand, this may protect the firstdisplay image 401 from rotating clockwise or anticlockwise due to handshakes. Thereby, this allows the observer to watch the first displayimage 401 in a clear, stable, and non-shaky manner.

A Fifth Implementation

As shown in FIG. 14, step S302 may include steps S701-S706.

At step S701, as shown in FIG. 17, a first distance value L1 of thefirst distance and a first preset size of the first display image isobtained at a first moment.

For example, the first distance value L1 may be obtained by means of adistance measuring device, such as an infrared distance measuring deviceor a ultrasonic distance measuring device. The first preset size may beeither entered by the user, or selected by the user from serverselectable sizes provided by the electronic device.

At step S702, a current projection angle of the projection unit isdetermined as a first projection angle a1 based on the first distancevalue L1 and the first preset size.

For example, the first projection angle a1 may be obtained based on thefollowing equation:

${a = {\frac{K_{1} \cdot S}{L} + K_{2}}},$

wherein a is a current projection angle, S is a first preset size, L isa first distance, K₁ and K₂ are correction coefficients, and S, K₁ andK₂ are constants.

At step S703, the data to be displayed 40 is projected by the projectionunit 102 onto the carrier 20 in the first projection angle a1 in such amanner that a size of the first display image 401 presented on thecarrier 20 is the first preset size.

At step S704, as shown in FIG. 18, a second distance value L2 of thefirst distance is obtained at a second moment after the first moment.The second distance value L2 is different from the first distance valueL1.

At step 705, the current projection angle is determined as a secondprojection angle a2 based on the second distance value L2 and the firstpreset size.

For example, the second projection angle a2 may be obtained based on thefollowing equation:

${a = {\frac{K_{1} \cdot S}{L} + K_{2}}},$

wherein a is a current projection angle, S is a first preset size, L isa first distance, K₁ and K₂ are correction coefficients, and S, K₁ andK₂ are constants.

At step S706, the data to be displayed 40 is projected by the projectionunit 102 onto the carrier 20 in the second projection angle a2 in such amanner that a size of the first display image 401 presented on thecarrier 20 is kept as the first preset size.

In this implementation, no manner how the first distance between theprojection unit 102 and the carrier 20 changes, the electronic devicemay present on the carrier 20 the first display image 401 meeting thefirst preset size. In this way, when the electronic device is held inhand, it is possible to protect the size of the first display image 401from becoming unstable due to hand shakes. Thereby, this allows theobserver to watch the first display image 401 in a clear and stablemanner.

A Sixth Implementation

As shown in FIG. 15, step S303 may include steps S801 and S802.

At step S801, the second display image 402 is determined, by an imagecollecting unit 104 (e.g., a camera) placed on the second surface, fromthe first display image 401 presented on the carrier 20 (at this moment,the first display image 401 is the data to be displayed 40).

At step S802, the second display image 402 is displayed by the displayunit 101.

In this implementation, as shown in FIGS. 6, 9, and 16, the seconddisplay image 402 directly facing the second surface of the electronicdevice is obtained by the image collecting unit 104 and then isdisplayed by the display unit 101.

A Seventh Implementation

Before step S301, this implementation may further include the followingoperations.

When the user starts an application, an interactive interface isprovided to the user by the display unit 101, such as acapacitive/resistive touch screen. On the interactive interface, thereis information presented for asking whether the user is to initiate theimage displaying method (its corresponding functions) or not. Moreover,the user's selection may be submitted via the interactive interface.

If the user chooses to initiate the image displaying method, step S301is performed again to allow the electronic device to take relatedinterface information of the application as the data to be displayed 40and then apply the image displaying method according to the embodimentsof the present disclosure in displaying the data.

One or more technical solutions according to embodiments of the presentdisclosure have at least technical effects as follows.

1. The embodiments of the present disclosure may use the projection unitto project data to be displayed onto the carrier, such as a wall or aprojection curtain. Moreover, the carrying area on the carrier fordisplaying the first display image is larger than the display area ofthe display unit. This may obtain on the carrier a large-size displayimage for the data to be displayed, thereby solving the technicalproblem of the existing mobile phone that the data to be displayedcannot be clearly displayed, thereby easily resulting in visual fatiguefor the user watching a small-size screen for long time. Then, the usermay see an enlarged image of the data to be displayed on the carrier.

2. The use of the projection unit may enable the mobile phone to sharethe data to be displayed on the carrier, such as a wall or a projectioncurtain, for more users to watch the data to be displayed.

3. According to the embodiments of the present disclosure, the displayunit of the electronic device is used to display the second displayimage. The second display image is a part of the first display image,which is shielded by the electronic device when the user watches overthe electronic device the first display image projected onto thecarrier. Thereby, the user may obtain more realistic game experiencesand visual enjoyment. For example, when the user is playing, forexample, a racing game as shown in FIG. 6, the second display image mayonly contain a racing car. At this time, the user may manipulate thegame as really driving in the racing car, and obtain the road conditionfor the racing car and its surroundings from the first display image401. Thereby, the user may obtain more realistic game experiences andvisual enjoyment.

4. According to the embodiments of the present disclosure, when theprojection unit performs a projection, if there is a translationmovement for the electronic device relative to the carrier, theprojection unit may make a corresponding adjustment to keep the firstdisplay image be presented on the same carrier area of the carrier. Thismay present the first display image on the first carrying area of thecarrier no matter how the electronic device translates. In this way,when a size of the carrier is small, it is possible to continuouslyproject the first display image onto the first carrying area. Meanwhile,this may further eliminate jitters of the translation movement of thefirst display image when the electronic device is held in hand, so thatthe observer watching the first display image can watch the firstdisplay image in a stable state without jitters.

5. According to the embodiments of the present disclosure, when theprojection unit performs a projection, if the electronic devices swingsclockwise or anticlockwise, the electronic device may make acorresponding adjustment to keep the horizontally displayed firstdisplay image be presented on the carrier. Thus, this may achieve thetechnical effect that the first display image projected onto the carriermay always keep in a horizontal situation no matter how the electronicdevice swings. In this way, when the electronic device is held in hand,this may protect the first display image from rotating clockwise oranticlockwise due to hand shakes. Thereby, this allows the observer towatch the first display image in a clear, stable, and non-shaky manner.

6. According to the embodiments of the present disclosure, a size of thefirst display image may be freely set. Moreover, the electronic devicemay adjust a projection angle of a projection unit in real time based onthe user setting and depending on a distance between the electronicdevice and the carrier. This may project from the size of the firstdisplay image from changing due to swinging of the electronic devicewhen it is held by the user. Thereby, the present disclosure may achievea technical effect of keeping the size of the first display imagepresented on the carrier unchanged.

Second Embodiment

This embodiment provides an electronic device for implementing the imagedisplaying method according to the embodiments of the presentdisclosure.

As shown in FIG. 19, the electronic device may include:

-   -   a display unit 101, such as a capacitive/resistive touch screen,        placed on a first surface of the electronic device 10;    -   a projection unit 102, such as a projector, placed on a second        surface of the electronic device 10 and having a projection        area, the first surface being opposite to the second surface;        and    -   a processor 103 connected to the display unit 101 and the        projection unit 102.

The processor 103 may be configured to: determine data to be displayed40 when the projection unit 102 is placed on the second surface of theelectronic device 10 opposite to the first surface; project, by theprojection unit 102, the data to be displayed 40 onto a carrier 20 topresent a first display image 401 on the carrier 20, wherein the carrier20 is placed in the projection area and the first display image 401 atleast corresponds to a first part of the data to be displayed 40;displaying, by the display unit 101, a second part of the data to bedisplayed 40 to display a second display image 402 corresponding to thesecond part on the display unit 101 in such a manner that when anobserver located at the display unit 101 side observes the first displayimage 401 and the second display image 402, the second display image 402is a part of the first display image 401, which is shielded by theelectronic device 10.

Preferably, a first distance between the carrier 20 and the projectionunit 102 is larger than or equal to a preset distance, so that acarrying area on the carrier 20 for carrying the first display image 401is larger than a display area of the display unit 101.

Preferably, the processor 102 may be further configured to: project, bythe projection unit 102, the data to be displayed 40 onto the carrier 20in a first projection direction; determine the carrying area on thecarrier 20 for carrying the first display image 401 as a first carryingarea 201, wherein the first carrying area 201 is a fixed area on thecarrier 20; detect whether there is a translation movement for theelectronic device 10 relative to the carrier 20; obtain a translationvector of the translation movement when detecting the translationmovement; determine a second projection direction based on thetranslation vector, wherein the second projection direction is aprojection direction that allows the electronic device 10 to, after thetranslation movement, project the data to be displayed 40 onto the firstcarrying area 201; and project, by the projection unit 102, the data tobe displayed 40 onto the first carrying area 201 in the secondprojection direction, so as to keep the first display image 401 bepresented on the first carrying area 201.

Preferably, the processor 103 may be further configured to: obtain acurrent included angle between a preset edge of the display unit 101 andthe horizontal direction; judge whether the current included angle is 0degree; when the current included angle is 0 degree, directly projectthe data to be displayed 40 onto the carrier 20 to present thehorizontally displayed first display image 401 on the carrier 20.

Preferably, the processor 103 may be further configured to: when thecurrent included angle is not 0 degree, determine an adjustment anglebased on the current included angle; adjust the data to be displayed 40based on the adjustment angle; and project the adjusted data to bedisplayed onto the carrier 20, so as to present the horizontallydisplayed first display image 401 on the carrier 20.

Preferably, the projection unit 102 may include a case 1021 and aprojection module 1023.

The case 1021 is in a sealed state. An accommodation cavity is formedinside the case 1021. A preset dose of liquid 1022 is held in theaccommodation cavity. A transmittance of a first face (A, B, C or D) ofthe case 1021 meets a preset condition.

The projection module 1023 is placed in the accommodation cavity. Theprojector 1023 is capable of floating on the liquid 1022. The projector1023 is capable of projecting the data to be displayed 40 onto thecarrier 20 though the first face (A, B, C, or D) of the case.

When the current included angle between the preset edge of the displayunit and the horizontal direction is 0 degree, the projector 1023 iscapable of presenting on the horizontally displayed first display image401 the carrier 20. When the current included angle is not 0 degree, theprojector 1023 is still capable of presenting the horizontally displayedfirst display image 401 on the carrier 20.

Preferably, the processor 103 may be further configured to: obtain afirst distance value of the first distance and a first preset size ofthe first display image 401 at a first moment; determine a currentprojection angle of the projection unit 102 as a first projection anglebased on the first distance value and the first preset size; project, bythe projection unit 102, the data to be displayed 40 onto the carrier 20in the first projection angle in such a manner that a size of the firstdisplay image 401 presented on the carrier 20 is the first preset size;obtain a second distance value of the first distance at a second momentafter the first moment, the second distance value being different fromthe first distance value; determine the current projection angle as asecond projection angle based on the second distance value and the firstpreset size; and project, by the projection unit 102, the data to bedisplayed 40 onto the carrier 20 in the second projection angle in sucha manner that a size of the first display image 401 presented on thecarrier 20 is kept as the first preset size.

Preferably, the electronic device 10 may further include an imagecollecting device 104 placed on the second surface and connected to theprocessor 103. In this case, the processor 103 may be further configuredto: determine, by the image collecting device 104, the second displayimage 402 from the first display image 401 presented on the carrier 20;and display the second display image 402 by the display unit 101.

The electronic device as described in this embodiment is an electronicdevice for implementing the image displaying method according to theembodiments of the present disclosure. The operating procedures of theelectronic device are identical with one or more embodiments of themethod. Thus, details thereof will be omitted here.

The technical solution according to the second embodiment of the presentdisclosure has at least technical effects as follows.

The second embodiment of the present disclosure provides a projectionunit. The projection unit includes a case and a projector. The case isin a sealed state. An accommodation cavity is formed inside the case.There is a preset dose of liquid held in the accommodation cavity. Atransmittance of a first face of the case meets a preset condition. Theprojector is placed in the accommodation cavity and floats on theliquid. The projector is capable of projecting the data to be displayedonto the carrier though the first face of the case. With such aprojection unit, when the current included angle between a preset edgeof the display unit and the horizontal direction is 0 degree, theprojector can present the horizontally displayed first display image onthe carrier. When the current included angle between the preset edge ofthe display unit and the horizontal direction is not 0 degree, theprojector can still present the horizontally displayed first displayimage on the carrier.

It will be appreciated that the embodiments of the present disclosuremay be embodied as methods, systems or computer program products.Therefore, the present disclosure may be implemented in a form of purehardware embodiments, pure software embodiments or embodimentsincorporating software and hardware. Moreover, the present disclosuremay be implemented in a form of a computer program product embodied onone or more computer readable storage medium (including, but not limitedto, a magnetic disk storage, a CD-ROM, a optical storage, etc)containing computer readable program codes.

The present disclosure is described with reference to flowcharts and/orblock diagrams of methods, devices (systems), and computer programproducts according to the embodiments of the present disclosure. It willbe appreciated that each flow and/or block in the flowcharts and/orblock diagrams and combinations thereof may be implemented by computerprogram instructions. The computer program instructions may be providedto a general purpose computer, a dedicated computer, an embeddedprocessor or processors of other programmable data processing devices toform a machine, so that apparatus for implementing functions designatedby one or more flows in a flowchart and/or one or more blocks in a blockdiagram may be generated by means of instructions executed by thecomputer or processors of other programmable data processing devices.

The computer program instructions may be also stored in a computerreadable storage, which can direct the computer or other programmabledata processing devices to operate in a specific manner. To this end,instructions stored in the computer readable storage may produce articleof manufacture including instructions means. The instructions meansimplement functions as specified in one or more flows in a flowchartand/or one or more blocks in a block diagram.

The computer program instructions may be also loaded into a computer orother programmable data processing devices, so as to execute a serial ofoperation steps on the computer or other programmable data processingdevices to produce actions taken by the computer. To this end,instructions executed on the computer or other programmable devices maybe provided to implement functions as specified in one or more flows ina flowchart and/or one or more blocks in a block diagram.

It will be appreciated by the person of skill in the art that variousmodifications may be made to the above described embodiments withoutdeparting from the scope of the present disclosure. Therefore, the scopeof the present disclosure should be recited in the claims.

What is claimed is:
 1. An image displaying method applied in anelectronic device, the electronic device comprising a display unit and aprojection unit having a projection area, the display unit being placedon a first surface of the electronic device, the method comprises:determining data to be displayed when the projection unit is placed on asecond surface of the electronic device opposite to the first surface;projecting, by the projection unit, the data to be displayed onto acarrier to present a first display image on the carrier, wherein thecarrier is placed in the projection area and the first display image atleast corresponds to a first part of the data to be displayed;displaying, by the display unit, a second part of the data to bedisplayed, to display a second display image corresponding to the secondpart on the display unit in such a manner that when an observer locatedat the display unit side observes the first and second display images,the second display image is a part of the first display image, which isshielded by the electronic device; wherein a first distance between thecarrier and the projection unit is larger than or equal to a presetdistance, so that a carrying area on the carrier for carrying the firstdisplay image is larger than a display area of the display unit.
 2. Themethod according to claim 1, wherein, said projecting, by the projectionunit, the data to be displayed on the carrier to present the firstdisplay image on the carrier comprises: projecting, by the projectionunit, the data to be displayed onto the carrier in a first projectiondirection; determining the carrying area on the carrier for carrying thefirst display image as a first carrying area, wherein the first carryingarea is a fixed area on the carrier; detecting whether there is atranslation movement for the electronic device relative to the carrier;obtaining a translation vector of the translation movement whendetecting the translation movement; determining a second projectiondirection based on the translation vector, wherein the second projectiondirection is a projection direction that allows the electronic deviceto, after the translation movement, project the data to be displayedonto the first carrying area; and projecting, by the projection unit,the data to be displayed onto the first carrying area in the secondprojection direction, so as to keep the first display image be presentedon the first carrying area.
 3. The method according to claim 1, wherein,said projecting, by the projection unit, the data to be displayed ontothe carrier to present the first display image on the carrier comprises:obtaining a current included angle between a preset edge of the displayunit and the horizontal direction; judging whether the current includedangle is 0 degree; when the current included angle is 0 degree, directlyprojecting the data to be displayed onto the carrier to present thehorizontally displayed first display image on the carrier; when thecurrent included angle is not 0 degree, determining an adjustment anglebased on the current included angle; adjusting the data to be displayedbased on the adjustment angle; and projecting the adjusted data to bedisplayed onto the carrier, so as to present the horizontally displayedfirst display image on the carrier.
 4. The method according to claim 1,wherein, the projection unit comprises: a case in a sealed state, insidewhich an accommodation cavity is formed, a preset dose of liquid beingheld in the accommodation cavity and a transmittance of a first face ofthe case meeting a preset condition; a projection module placed in theaccommodation cavity and floating on the liquid, the projection modulebeing capable of projecting the data to be displayed onto the carrierthough the first face of the case; wherein the current included anglebetween the preset edge of the display unit and the horizontal directionis 0 degree, the projection unit is capable of presenting thehorizontally displayed first display image on the carrier; and when thecurrent included angle is not 0 degree, the projection unit is stillcapable of presenting the horizontally displayed first display image onthe carrier.
 5. The method according to claim 1, wherein, saidprojecting, by the projection unit, the data to be displayed onto thecarrier to present the first display image on the carrier comprises:obtaining a first distance value of the first distance and a firstpreset size of the first display image at a first moment; determining acurrent projection angle of the projection unit as a first projectionangle based on the first distance value and the first preset size;projecting, by the projection unit, the data to be displayed onto thecarrier in the first projection angle in such a manner that a size ofthe first display image presented on the carrier is the first presetsize; obtaining a second distance value of the first distance at asecond moment after the first moment, the second distance value beingdifferent from the first distance value; determining the currentprojection angle as a second projection angle based on the seconddistance value and the first preset size; and projecting, by theprojection unit, the data to be displayed onto the carrier in the secondprojection angle in such a manner that a size of the first display imagepresented on the carrier is kept as the first preset size.
 6. The methodaccording to claim 1, wherein, said displaying, by the display unit, thesecond part of the data to be displayed comprises: determining, by animage collecting unit placed on the second surface, the second displayimage from the first display image presented on the carrier; anddisplaying the second display image by the display unit.
 7. Anelectronic device, comprising: a display unit placed on a first surfaceof the electronic device; a projection unit placed on a second surfaceof the electronic device and having a projection area, the first surfacebeing opposite to the second surface; a processor connected to thedisplay unit and the projection unit, the processor being configured to:determine data to be displayed when the projection unit is placed on asecond surface of the electronic device opposite to the first surface;project, by the projection unit, the data to be displayed onto a carrierto present a first display image on the carrier, wherein the carrier isplaced in the projection area and the first display image at leastcorresponds to a first part of the data to be displayed; displaying, bythe display unit, a second part of the data to be displayed, to displaya second display image corresponding to the second part on the displayunit in such a manner that when an observer located at the display unitside observes the first and second display images, the second displayimage is a part of the first display image, which is shielded by theelectronic device; wherein a first distance between the carrier and theprojection unit is larger than or equal to a preset distance, so that acarrying area on the carrier for carrying the first display image islarger than a display area of the display unit.
 8. The electronic deviceaccording to claim 7, wherein, said processor is further configured to:project, by the projection unit, the data to be displayed onto thecarrier in a first projection direction; determine the carrying area onthe carrier for carrying the first display image as a first carryingarea, wherein the first carrying area is a fixed area on the carrier;detect whether there is a translation movement for the electronic devicerelative to the carrier; obtain a translation vector of the translationmovement when detecting the translation movement; determine a secondprojection direction based on the translation vector, wherein the secondprojection direction is a projection direction that allows theelectronic device to, after the translation movement, project the datato be displayed onto the first carrying area; and project, by theprojection unit, the data to be displayed onto the first carrying areain the second projection direction, so as to keep the first displayimage be presented on the first carrying area.
 9. The electronic deviceaccording to claim 7, wherein, said processor is further configured to:obtain a current included angle between a preset edge of the displayunit and the horizontal direction; judge whether the current includedangle is 0 degree; when the current included angle is 0 degree, directlycontrol the projection unit to project the data to be displayed onto thecarrier to present the horizontally displayed first display image on thecarrier; when the current included angle is not 0 degree, determine anadjustment angle based on the current included angle; adjust the data tobe displayed based on the adjustment angle; and project the adjusteddata to be displayed onto the carrier, so as to present the horizontallydisplayed first display image on the carrier.
 10. The electronic deviceaccording to claim 7, wherein, the projection unit comprises: a case ina sealed state, inside which an accommodation cavity is formed, a presetdose of liquid being held in the accommodation cavity and atransmittance of a first face of the case meeting a preset condition; aprojection module placed in the accommodation cavity and floating on theliquid, the projection module being capable of projecting the data to bedisplayed onto the carrier though the first face of the case; whereinwhen the current included angle between the preset edge of the displayunit and the horizontal direction is 0 degree, the projection unit iscapable of presenting the horizontally displayed first display image onthe carrier; and when the current included angle is not 0 degree, theprojection unit is still capable of presenting the horizontallydisplayed first display image on the carrier.
 11. The electronic deviceaccording to claim 7, wherein, said processor is further configured to:obtain a first distance value of the first distance and a first presetsize of the first display image at a first moment; determine a currentprojection angle of the projection unit as a first projection anglebased on the first distance value and the first preset size; project, bythe projection unit, the data to be displayed onto the carrier in thefirst projection angle in such a manner that a size of the first displayimage presented on the carrier is the first preset size; obtain a seconddistance value of the first distance at a second moment after the firstmoment, the second distance value being different from the firstdistance value; determine the current projection angle as a secondprojection angle based on the second distance value and the first presetsize; and project, by the projection unit, the data to be displayed ontothe carrier in the second projection angle in such a manner that a sizeof the first display image presented on the carrier is kept as the firstpreset size.
 12. The electronic device according to claim 7, wherein,said electronic device further comprises: an image collecting deviceplaced on the second surface and connected to the processor; whereinsaid processor is further configured to: determine, by the imagecollecting device, the second display image from the first display imagepresented on the carrier; and display the second display image by thedisplay unit.